Permanently-acting centrifugal machine



May 4,1926. 1,583,056

' T. LANGENBERG PERHANENTLY ACTING CENTRIFUGAL MACHINE Filed 9, 1925 V ,4v2f272ou4 Patented May 4, 1926.

U TES N-ITVED STA PATENLT'V OFFICE.

THEODOB LANGENBERG, Oi BERLIN, GERMANY, ASSIGNOR TO THE FIRM O! C. A. FESCA 80-80314, OF BERLIN, GERMANY.

PERHANENTIiY-ACTIHG GENTRIFUGAL MACHINE.

Application filed. May 9, 1925. Serial No. 29,134.

Toall whom it may concern: Be it known that I, THEODOR LArIGEN- BERG, a citizen of the German Repubhc, residing at Berlin, Germany, have invented certain new and useful Improvements 1n Permanently-Acting Centrifugal Machines, of which the following is a specification.

This invention relates to a permanently acting centrifugal machine comprising two straining-cups adapted to be moved apart or together and-to be closed by friction surfaces. The lower straining cup is. driven and shiftable in axial direction, the upper straining cup being not shiftable but merely rotatable. The emptying of this two-cup centrifugal machine is effected by pulling away of the lower rotating strainer cup from the upper straining cup so that the residues are thrown out through the annular gap which has been formed between the cups.

Permanently acting centrifugal machines with straining cups movable the one with regard-to the other have become known. In centrifugal machines of known type the upper straining cup is, however, fixed by means of ribs on a shaft adapted to be displaced in axial direction, said ribs being situated in the centrifugal drum. These ribs prevent 'a uniform charging of the drum, the material sticks on the same and the passage will soon be clogged. I

A piston, connected with the step bearing casing of the shaft for the straining cup, said casing being shiftable, serves for displacing the lower straining cup. The piston is tightl fitted in a cylinder in which it is moved to and fro by the admission and escape of a pressure fluid.

Owing to this arrangement the lower straining cup can be movedfree fromshocks. The pressure at which this cup is pressed on the upper cup may be varied according to requirement. 1 Hydraulic pistons have been used for dis placing centnfugal drums, but these pistons participate in the rotating movement of the shafts in thestationary cylinders. Owing to thehigh revolving speed the pistons wear rapidly, wherefrom the packing between piston and cylinder suffers. 3 It has further become known, to make" the piston, connected with the shaft of the centrifugal' drum. and the cylinder, participate in the rotation of the shaft.

This arrangement presents the inconvenience that the pressure fluid must be fed to the cylinder through hollow shafts. It is furthernot practical if the fluid in the cylinders is also submitted to the centrifugal forces which produce, besides the pressure produced by the fluid, an additional pressure dependent on the revolving speed of the shafts. An embodiment of the invention is shown 1n section, by way-of example, in the only figure of the accompanying drawings. I

The straining cup 1, which has the shape of a hollow cone, is fixed on the shaft 2 driven in a: manner known per se and it has friction surfaces 3 on its upper edge; The perforated portion 32 of the cup 1 is en closed by an envelope 4 which deflects the liqililid thrown out through the perforated wa A neck piece 6 mounted above the strain- 1ng cup 1v in the lid 5 of the casing, serves as charging hopper for the material to be submitted tothe action of the centrifugal force. On the neck piece 6 astraining cup. 7 is fixed which has friction surfaces 8. on its lower edge,'said friction surfaces 8 being adapted to be brought into engagement with the friction surfaces of the straining cup 1,

whereby a perfectly tight joint between the straining cups is ensured.

In the casing 9 a channel 10 is arranged, designed to receivetthe liquid thrown out through the perforated portion 33 of the straining cup 7. A' channel 11in the casing 9 serves to. receivethe solid constituents of the liquid when the straining cup 1 is in the.

lower position as shown at the left side of the figure. I

When the straining cup 1 is in the raised position, shown at the right side of the figure, the channel 11 is closed by the envelope 4.- so that no liquid from cup 1 can flow into the channel 11. The liquid from cup 1 collects in the chamber 12 in the casing 9, said chamber being connected by several tubular passages 13witl1 the channel 10. The liquid coming from channel 10 andfrom the cham- ,bearing casing 16 which is mounted in a bracket 17 fixed on casing 9 so that said case ing 16 can be moved in vertical directions but not rotate. On the lower end of the step bearing casing 11 a piston 19 is fixed by a bolt 18, said piston being mounted in a cylinder 21 closed by a lid 20. In the inflow pipe '22 and in the out flow pipe 23 of the cylinder 21 valve casings 24 and 25 respectively are arranged in which spring-controlled valves 26, 27, are located. On the free ends of the valve stems rollers 28 and 29 respectively are fixed. These gollers slide upon the circumference of a ram 31 keyed on a shaft 30. When the cam-31 rotates the valves 26 and 27 are operated in such a manner that the valve 26 opens When'the valve 27 closes and inversely.

Oil, water, air or the like, supplied from a pump 'or from a counter-weighted accumulator, may be used as pressurefluid.

When the inlet valve 26 is open and the outlet valve 27 is closed the pressure fluid flows through the pipe 22 into the cylinder 21, the piston 19 and the shaft 2 are raised and the cup l is pressed against cup 7.

When the shaft 2 revolves the material contained on the straining cups is projected through the perforated portions 32 and 33 of the straining cups. The liquid flows into the channel 10 and into the chamber 12 and thence through the passages 13 into the channel 10 to be dischargedthrough the tubular outflow 14.

When the cam 31 has arrived at the position shown in the figure the inlet valve 26 is closed and the outlet valve 27 is open. The pressure fluid escapes therefore, through the pipe 23 from the cylinder 21; the shaft 2 descends free from shocks. The cupl is thus moved away from the cup 7, and the solid residues are thrown out of the straining cups through the annular gap, which as formed between the cups 1 and 7, and enters into the channel 11, to drop into a receptacle placed underneath the outflow end I of this channel.

Instead of one cam for the two valves a separate cam for each valve ma be provided so that, the revolving speed 0 shaft 30 re: mainmg uniform, the-periods for the discharge centrifugal process may be" varied.

'Iclaim:- .1. Apermanently acting centrifugal ma chine comprising in combination an upper perforated straining cup, rotatable but fixed against longitudinal movement, a lower of the solid residues and for the straining cup, displaceable axially, means to rotate said lower cup, friction surfaces on the facingedges of said cups to drivethe.

upper one from the lower when they are.

engaged and automatic means to periodically *the facing edges of said cups to drive the upper one from the lower when'they are en'- gaged, said upper cup having an unencumbered vertical filling neck, and automatic means to periodically engage and disengage said lower cup from said upper cup.

3. A permanently act'ng centrifugal machine comprising in combination an upper perforatedv straining cup mounted for rotation, a lower perforated straining cup, a shaft therefor, means to rotate said shaft and cup,"friction surfaces on said cup adapted to."

be engaged to drive'the upper cup, a step, bearing casing forming a lower bearing for said 1 shaft, said casing being 'slidably mounted, and a hydraulic "pistonfor raising andlowering' said bearing casing and said cup and shaft.

4. A permanently acting centrifugal niachine comprising in combination an'upper perforated straining cup mounted for rotation, a lower perforated straining cup; a

and cup, friction surfaces 'on said cup adapted to be engaged to drive the upper 'shafttherefor," means to rotate said shaft slidably mounted, and a hydraulic piston for raising and lowering said bearing casing and said cup and shaft, the movements of said piston being controlled by a pair of automatically operating valves.

ture.

TI-IEODOR- LANGENBERG.

In testimony whereof I aflix my signa- 

